196 MEMOIR OF DR. DALTON, AND 



" Nearer determination of the law hy which the quantities 

 of the alkaline earths, which enter into rest and neutrality 

 with muriatic and vitriolic acid, increase or diminish in 

 arithmetical progression. § XXIV., p. 34. 



"A. As we cannot completely ascertain the law by which 

 the terms of the two series of numbers obtained by experiment 

 proceed, we must try another source of information, to the ob- 

 taining of which the series itself which the determining element 

 of muriatic acid makes with the alkaline earths, gives us an 

 opportunity. As the differences of the quantities in § XXII. 

 are a product of a quantity 6 with an odd number, it is 

 possible that as many terms are wanting as there are odd 

 numbers between 3 and 19, and even that other terms may 

 lie beyond the term «+196 or -^4-19. Suppose, then, that 

 this series were complete, namely, 'a, a-\-h, a-\-Zb, a-\-bhy 

 a^lb, a+9^ a+Il^ a+136, a+156, 0+176, a+196, 

 a + 21&, a + 236, &c., the masses of the elements which enter 

 into neutrality with 1000 parts of muriatic acid would be the 

 following : — 



a =734 = 734 



a + i = 734 + 124J = 8581 



a + 35 = 734 + 3.124J = 1107J 



a + 55 = 734 + 5.124J = 13561 



a + 75 = 734 + 7.124i = 1605^ 



a + 95 = 734 + 9.1241 = 1854^ 



a + 115 = 734 + 11.1241 = 2103^ 



a + 135 = 734 + 13.124J = 2352J 



o + 155 = 734 + 15.124J = 2601J 



a + 175 = 734 + 17.124^ = 2850i 



o + 195 = 734 + 19.124J = 3099J 



a + 215 = 734 + 21.124J = 3348J 



a + 235 = 734 + 23.124J = 3597J 



&c. &c. &c. 



